Measurements:
°C
°F
CURRENT WEATHER
12:11
Key West
90°F
E 11 mph
Feels like: 98°F
Precip: 0%
World Resorts USA Key West Weather

7 Day Weather Forecast

05.14
thu
DAY
90°F
E 11 mph
precip
0%
NIGHT
84°F
SE 9 mph
precip
0%
05.15
fri
DAY
82°F
S 3 mph
precip
0%
NIGHT
84°F
SW 2 mph
precip
0%
05.16
sat
DAY
86°F
NW 13 mph
precip
0%
NIGHT
88°F
NW 19 mph
precip
87%
05.17
sun
DAY
86°F
NW 16 mph
precip
0%
NIGHT
86°F
W 20 mph
precip
0%
05.18
mon
DAY
86°F
NW 17 mph
precip
77%
NIGHT
88°F
W 22 mph
precip
100%
05.19
tue
DAY
86°F
W 17 mph
precip
100%
NIGHT
88°F
W 22 mph
precip
84%
05.20
wed
DAY
86°F
W 16 mph
precip
100%
NIGHT
86°F
W 18 mph
precip
23%

Key West Sea Water Temperature in May, °F

Select Year: 2025 2024 2023

The average sea surface temperature in May 2025 for Key West was 28.6°F. The maximum and minimum values were 26.2°F and 30.5°F respectively.

Key West on the Weather Map

Best Time to Visit Key West
The most sunny months:
May 16 days
March 16 days
April 16 days
The most warm months:
August 91.6 °F
July 91.0 °F
September 89.7 °F
Warmest sea temperature:
August 91.3 °F
July 90.6 °F
September 90.1 °F
The most cold months:
January 74.4 °F
February 76.3 °F
December 78.2 °F
The most rainy months:
June 7 days
August 7 days
September 6 days
The most windy months:
November 14 mph
December 14 mph
January 14 mph
more details